• Westone Audio MACH 20 in-ear monitors with BaX T2 cable, front view
  • Westone Audio MACH 20 earpiece, faceplate side view
  • Westone Audio MACH 20 pair resting on a table
  • Westone Audio MACH 20 exploded view with its two balanced-armature drivers
  • Westone Audio MACH 20 inner side with blue left and red right markings
  • Westone Audio MACH 20 in-ear monitors, lifestyle image
1 6

Westone Audio

Westone Audio MACH 20 In-Ear Monitors — Dual Balanced Armature, BaX T2 Cable

Westone Audio MACH 20 In-Ear Monitors — Dual Balanced Armature, BaX T2 Cable
  • Genuine & Brand-New
  • Free Shipping · Ships from China
  • 1-Year Warranty
  • 45-Day Returns
$327.99 USD
$327.99 USD
Shipping calculated at checkout.

The Westone Audio MACH 20 is a universal-fit in-ear monitor with two proprietary balanced-armature drivers per side, one for bass and one for mids and treble, rated 110dB @ 1kHz and 96Ω, on a detachable Linum BaX T2 cable. It suits drummers, bass players and DJs who want more low end in their monitor mix.

Who the Westone Audio MACH 20 is for

  • Drummers, bass players and DJs: Westone Audio recommends the MACH 20 for anyone who wants more bass and describes a big, punchy low end with clear, natural mids and extended treble.
  • Bass-heavy monitor mixes: A dedicated balanced-armature bass driver handles the low end while a second armature covers mids and treble.
  • Long gigs: The ergonomic universal-fit shell is designed for all-day wear, with 5 pairs each of foam and silicone tips to get a secure seal.
  • Gigging and travel: The silver-plated copper BaX cable detaches at T2 sockets, and a crushproof, watertight mini monitor vault protects the set between shows.
  • Skip it if: you want a flat, reference-style sound; Westone tunes the MACH 20 for a big, punchy low end and points studio engineers seeking accuracy to the MACH 80.

Westone Audio MACH 20 key specs

  • Drivers: 2 proprietary balanced armatures per side (1 bass, 1 mid/treble)
  • Frequency response: 20Hz–18kHz
  • Sensitivity: 110dB @ 1kHz
  • Impedance: 96Ω @ 1kHz
  • Cable: Linum BaX T2, silver-plated copper, 50 in (127cm), 3.5mm plug
  • Connector: T2, detachable
  • Ear tips: 5 pairs foam + 5 pairs silicone
  • Case and extras: Impact-resistant mini monitor vault, cloth pouch, cable band, cleaning tool
  • Fit: Universal fit, cable worn over the ear

Genuine Westone Audio stock. Free shipping on every order, 45-day returns.

Westone Audio MACH 20 vs similar options

  • vs CVJ Kumo: Packs 16 balanced armatures with onboard tuning switches and a bass toggle; pick the MACH 20 for a simpler dual-BA monitor with a detachable BaX T2 cable and a crushproof vault.
  • vs SIMGOT EA2000: Uses one dynamic driver plus a passive radiator and suits a dongle DAC or DAP; pick the MACH 20 for dual balanced armatures, 110dB @ 1kHz sensitivity and T2 connectors.
View full details

Specifications

Driver 2 proprietary balanced armatures per side (1 bass, 1 mid/treble)
Impedance 96Ω @ 1kHz
Sensitivity 110dB @ 1kHz
Frequency response 20Hz–18kHz
Connector Detachable T2 cable (Linum BaX), 3.5mm plug

What's in the box

  • MACH 20 universal-fit in-ear monitors (left and right)
  • Linum BaX T2 cable, 50 in (127cm), 3.5mm plug
  • 5 pairs foam ear tips
  • 5 pairs silicone ear tips
  • Impact-resistant mini monitor vault
  • Cloth pouch
  • Cable band
  • Cleaning tool
Good to know

Buying from TonePier

Is this unit genuine?

Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.

Where does my order ship from, and how long does it take?

Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.

What if it isn't for me?

You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.